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Gary LaPook wrote:

There are many web sites that have information available on navigation.
You can access Bowditch On Line free at:


http://www.i-DEADLINK-com/bowditch/


you will soon learn that "Bowditch" (The American Practical Navigator
published by the US Navy Hydrographic Office (H.O.)  as publication
number 9; H.O. number 9) is the standard reference work on this subject.



You can access, for free, an online version of the Nautical Almanac at:

http://www.tecepe.com.br/scripts/AlmanacPagesISAPI.isa

unfortunately it doesn't include the increments pages from the N.A.
which are needed. However, if you get your hands on an old copy of the
N.A. you can use its increments tables because they do not change from
year to year.

You can also download. for free, a program that does the celestial
computations for you which is handy when making many practice shots and
also for checking your work when doing the computations by hand:

http://www.tecepe.com.br/nav/default.htm


For tables either H.O 249 or H.O. 229 or H.O. 214 are all very similar
and 249 is the most convenient but only has a precision of one minute of
arc which is an accuracy on one nautical mile which is realistic on a
small boat. If you want higher precision, especially for practice shots
while on shore, then 229 or 214 will do.  214 is out of print but I
think its arrangements of the tables is more convenient than in 229.

BTW, does anybody know why they switched from the 214 format to the 229
format so you cant just do a round of sight using only one page as you
could do with 214 but have to chase all over for the LHAs?

If you want a short tabular method H.O. 208 is my preference.

You can find many of these books on ebay.


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